Prove that
Question:

$x^{2}+5=0$

 

Solution:

Given:

$x^{2}+5=0$

$\Rightarrow x^{2}=-5$

$\Rightarrow x=\pm \sqrt{(}-5)$

$\Rightarrow x=\pm \sqrt{5} i$

Ans: $x=\pm \sqrt{5} i$

 

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